Commission approves nontraditional wastewater system and concept plans for Star Creek and Hyde Park subdivisions

Williamson County commissioners on the motion passed approval of a nontraditional wastewater treatment and disposal system intended to serve the 34-lot Star Creek subdivision, the revised 16-lot Hyde Park subdivision and an adjacent county park and emergency management facility, staff said.

County planning staff told the commission the treatment site covers about 2 acres. "Finally, staff does recommend approval of the nontraditional wastewater system with the conditions outlined in the staff report, including the posting of a performance bond for the system," Planning staff said during the meeting.

The county presentation said a certificate of convenience and necessity (CCN) and a draft standard operating procedure have been issued for the system, and that the design data report (DDR) and the design site investigation report (DSIR) were reviewed by the county wastewater consultant and found to meet ordinance standards. The presentation recommended approval subject to the standard conditions identified in the staff report.

Richard Howes, an applicant representative with SCC, said the system was sized only to serve the Star Creek subdivision (34 lots), the Hyde Park subdivision (16 lots) and the proposed emergency management facility. "There is no extra capacity," Howes said.

Staff said anticipated sewer flows for the park and emergency management facility were assumptions provided by the county parks and recreation and emergency management (EMA) departments and were designed into the plans; the exact scope of the county facility had not been finalized at the time of the hearing.

As presented, Star Creek would cover 232 acres with 172.32 acres allocated for development to create 34 traditional lots. Lot sizes would range from about 5.00 to 5.24 acres, producing an overall density of roughly one unit per 6.82 acres; the concept plan shows about 39.22 acres of open space. Water service for Star Creek and Hyde Park was identified as the Nolensville College Grove Utility District; wastewater service was to be provided by the approved nontraditional system.

The revised Hyde Park concept plan covers approximately 109.69 acres and remains a 16-lot traditional subdivision with lots between about 5.02 and 7.47 acres, a density of about one unit per 6.86 acres, and roughly 17.66 acres of open space. Hyde Park would switch from individual septic systems to connection with the Star Creek nontraditional wastewater system, contingent on the system's approval. Roads within both concept plans were shown as private and gated. A traffic study for Hyde Park recommended only signage improvements; staff noted those signage improvements are a condition of approval and will be implemented.

The commission voted to approve the wastewater system and both concept plans; motions carried without recorded dissent.

Next steps identified by staff include addressing the standard conditions listed in the staff reports at subsequent development stages, completing final design and permitting for the nontraditional wastewater system, and posting the required performance bond before the system is placed in service.